fix travis build, -frameworks needs to append to p not visa versa

Author: Mpdreamz

build/scripts/Testing.fsx

@@ -30,7 +30,7 @@ module Tests =
             let p = ["xunit"; "-parallel"; "all"; "-xml"; "../.." @@ Paths.Output("TestResults-Desktop-Clr.xml")] 
             match (target, buildingOnTravis) with 
             | (_, true) 
-            | (One, _) -> p |> List.append ["-framework"; "netcoreapp1.1"]
+            | (One, _) -> ["-framework"; "netcoreapp1.1"] |> List.append p 
             | _  -> p
 
         let dotnet = Tooling.BuildTooling("dotnet")